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大豆播種機(jī)破碎式仿生覆土裝置設(shè)計(jì)與試驗(yàn)
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國家重點(diǎn)研發(fā)計(jì)劃項(xiàng)目(2017YFD0701103)和國家重點(diǎn)研發(fā)計(jì)劃-政府間國際科技創(chuàng)新合作重點(diǎn)專項(xiàng)(S2016G4501)


Design and Test of Crushing Bionic Soil Covering Device of Soybean Seeder
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    摘要:

    受東方螻蛄刺狀挖掘足能夠高效挖掘土壤的啟發(fā),設(shè)計(jì)了大豆播種機(jī)破碎式覆土裝置,以提高其碎土性能。對(duì)東方螻蛄前足的趾爪趾長、趾尖角、趾間距、側(cè)面的楔角進(jìn)行測(cè)量,以此為依據(jù)設(shè)計(jì)了仿生碎土圓盤。破碎式仿生覆土裝置由大小碎土圓盤、折彎法蘭、固定機(jī)架、旋轉(zhuǎn)副、減震彈簧和懸掛架組成。本覆土裝置專為雙行種子溝設(shè)計(jì),可實(shí)現(xiàn)對(duì)大豆溝槽雙側(cè)進(jìn)行覆土。對(duì)仿生碎土圓盤碎土齒進(jìn)行了受力分析,并利用Ansys及LsDyna軟件對(duì)所設(shè)計(jì)部件進(jìn)行仿真優(yōu)化分析,得到碎土圓盤切削受力情況土壤的等效應(yīng)力分布以及覆土過程中種子橫向位移。田間試驗(yàn)結(jié)果表明破碎式仿生覆土裝置完成了覆土功能要求,破碎率達(dá)到92.2%,平均覆土厚度為2.4cm,平均種子行間距為10.1cm。

    Abstract:

    Inspired by the efficient mining of soil function of the oriental mole cricket claws, crushing soil covering device was put forward to improve the performance of the broken soil. The toe claws of the oriental mole cricket forefoot and toe high angle, toe distance and lateral wedge angle were measured, on the basis of this, the bionic soil crushing disc was designed. The crushing type bionic soil covering device consisted of discs of big and small, bending flange, fixed frame, rotating pair, damping spring and suspension frame. The covering soil device was designed for double row seed groove, which can be used to cover the soil of two sides of soybean grooves. Ansys and Ls-Dyna softwares were used to simulate and analyze the designed components. Through the simulation analysis of the crushing bionic soil covering device, the soil broken process was simulated actually and intuitively. The cutting force and equivalent stress distribution of soil and lateral displacement of soil were obtained. Through the analysis of equivalent stress of broken soil, the equivalent stress was greater than the shear strength of the dry soil which ensured the broken effect on the dry soil. Field test results showed that the crushing bionic soil covering device completed the function requirements of soil covering, and had strong soil fragmentation and the crushing rate was 92.2%, the average thickness of covering soil was 2.4cm, and the average seed spacing was 10.1cm.

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張志君,孫旭偉,金柱男,邴政,孫霽宇,佟金.大豆播種機(jī)破碎式仿生覆土裝置設(shè)計(jì)與試驗(yàn)[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2018,49(2):34-40,73. ZHANG Zhijun, SUN Xuwei, JIN Zhunan, BING Zheng, SUN Jiyu, TONG Jin. Design and Test of Crushing Bionic Soil Covering Device of Soybean Seeder[J]. Transactions of the Chinese Society for Agricultural Machinery,2018,49(2):34-40,73.

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  • 收稿日期:2017-11-09
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  • 在線發(fā)布日期: 2018-02-10
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